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pc-bios/s390-ccw: Allow booting in case the first virtio-blk disk is bad 

If you try to boot with two virtio-blk disks (without bootindex), and
only the second one is bootable, the s390-ccw bios currently stops at
the first disk and does not continue booting from the second one. This
is annoying - and all other major QEMU firmwares succeed to boot from
the second disk in this case, so we should do the same in the s390-ccw
bios, too.

Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20200806105349.632-8-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Thomas Huth 2020-07-28 18:14:50 +02:00
parent 869d0e2f59
commit 5dc739f343
2 changed files with 24 additions and 12 deletions
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34
pc-bios/s390-ccw/bootmap.c
View File

@ -289,11 +289,18 @@ static void ipl_eckd_cdl(void)
read_block(1, ipl2, "Cannot read IPL2 record at block 1");
mbr = &ipl2->mbr;
IPL_assert(magic_match(mbr, ZIPL_MAGIC), "No zIPL section in IPL2 record.");
IPL_assert(block_size_ok(mbr->blockptr.xeckd.bptr.size),
"Bad block size in zIPL section of IPL2 record.");
IPL_assert(mbr->dev_type == DEV_TYPE_ECKD,
"Non-ECKD device type in zIPL section of IPL2 record.");
if (!magic_match(mbr, ZIPL_MAGIC)) {
sclp_print("No zIPL section in IPL2 record.\n");
return;
}
if (!block_size_ok(mbr->blockptr.xeckd.bptr.size)) {
sclp_print("Bad block size in zIPL section of IPL2 record.\n");
return;
}
if (!mbr->dev_type == DEV_TYPE_ECKD) {
sclp_print("Non-ECKD device type in zIPL section of IPL2 record.\n");
return;
}
/* save pointer to Boot Map Table */
bmt_block_nr = eckd_block_num(&mbr->blockptr.xeckd.bptr.chs);
@ -303,10 +310,14 @@ static void ipl_eckd_cdl(void)
memset(sec, FREE_SPACE_FILLER, sizeof(sec));
read_block(2, vlbl, "Cannot read Volume Label at block 2");
IPL_assert(magic_match(vlbl->key, VOL1_MAGIC),
"Invalid magic of volume label block");
IPL_assert(magic_match(vlbl->f.key, VOL1_MAGIC),
"Invalid magic of volser block");
if (!magic_match(vlbl->key, VOL1_MAGIC)) {
sclp_print("Invalid magic of volume label block.\n");
return;
}
if (!magic_match(vlbl->f.key, VOL1_MAGIC)) {
sclp_print("Invalid magic of volser block.\n");
return;
}
print_volser(vlbl->f.volser);
run_eckd_boot_script(bmt_block_nr, s1b_block_nr);
@ -398,7 +409,8 @@ static void ipl_eckd(void)
read_block(0, mbr, "Cannot read block 0 on DASD");
if (magic_match(mbr->magic, IPL1_MAGIC)) {
ipl_eckd_cdl(); /* no return */
ipl_eckd_cdl(); /* only returns in case of error */
return;
}
/* LDL/CMS? */
@ -825,5 +837,5 @@ void zipl_load(void)
panic("\n! Unknown IPL device type !\n");
}
panic("\n* this can never happen *\n");
sclp_print("zIPL load failed.\n");
}

2
pc-bios/s390-ccw/main.c
View File

@ -240,7 +240,7 @@ static void ipl_boot_device(void)
break;
case CU_TYPE_VIRTIO:
if (virtio_setup() == 0) {
zipl_load(); /* no return */
zipl_load(); /* Only returns in case of errors */
}
break;
default: